Mine is a 9".

 

... in other words, don't do it for your street driven vehicle. The trade offs are not worth the 'reward' for 99.9% of drivers. I HAD a Detroit Locker in a 9" in my '65 GT coupe. I was driving on a concrete (not a.c. pavement) street that was moist from dew. As I went along a long sweeping curve under light throttle, the rear locked up, kicked the rear over, nicked a parked car and spun me like a top. Although the damage was light to the Mustang (totalled the crappy parked car), nearly hitting a tree in the median made me reevaluate things. I swapped in anLSD immediately. Heck, I don't even like them in Jeeps, preferring ARB lockers.

Oh yeah, 3.80's behind a C4? [sm=chairshot.gif]

 

yep 3.80s in a c4. maybe yall can tell me "i told ya so" later when i start whining about them, but until then SHOVE IT thanks for the advice, LSD unit it is. i dont wanan die[:@]

 

I drive my Powertrax in crappy weather and good alike, it does take a bit different driving style but it's not out of hand. If you coast/light throttle in a turn it's unlocked, if you go straight, or give it throttle(even in a turn) it locks. But, the engagement of the locker is very smooth, so when it does lock in a turn the only thing it does is give a bit of understeer, which is typical of a locked axle car in a turn. The only real dislike I have with it is in very tight radius turns, like in parking lots etc, if you suddenly get out of the throttle and/or let out the clutch, depending on how tight you turn and how fast you're going, it generates driveline slap, and the locker may lock-unlock-lock-unlock. It's really just annoying, but it has traction for days. And when I'm in turns and nail the throttle hard, if the back end starts to come out from powering it, as soon as the locker locks up it greatly dampens that cars tendancy to spin out or fishtail, though a lot of that is in my suspension setup as well.

Just stuff to consider. It's not the ideal setup for going through turns, but if you want a crapload of straightline power and a locker that doesn't have parts that wear out, the Powertrax is great. If you road race, or auto-x or just want something that'll work great through turns and aren't as concerned about straight line acceleration, then a LSD would prolly work out better. It just really depends on application

 

i don't know about the Powertrax, but my weapon of choice would be the Detroit Truetrac.
Its a geared LSD
Operates as a open diff (as all LSD's do) until you start to lose traction to one wheel. then it starts to put power to the other.
there's no understeer, no banging/ clanging as it engages and no slipping clutches. it's engagement is seamless.
PM gunjam - he just fitted one and loves it. If you've ever driven on one, you'd never go back to a clutch type lsd again.

http://www.eatonperformance.com/diff...-Truetrac.html

 

The Truetrac looks like a good setup, similar to someTorsens. No clutches to wear out

 

i have hada Torsen as well.
it was a total failure as it couldnt handle the torque...you would lose traction to one wheel. it would try to put power to the other. couldnt hook up so it would just sh*t itself and put no power anywhere...just make horrible destructive sounding noises. And it was 3x the price (here anyways)

 

My Powertrax was like $420 for the unit, and man, it sure puts power down in a straight line. I like it for a drag race/street car setup

 

I think the T2-R is supposed to fix this. I think the standard T-2 needs to have some resistance on each wheel, where the R model has a preload of some sort. They're intended more toward cornering and all-around good street manners rather than being primarily dragstrip/occasional street usehardware as the lockers are. Each has its strong points, preferred use, and weaknesses, so you choose accordingly.


Norm

 

the truetrac works in a straight line or on the corners and so far so good is handling the power and torque in the rally car.

i have a minispool in a race car (fitted by PO bcos it was cheap). once i blow that up i will be going truetrac there as well with full floating axles. then i will never kill it!

its horses for courses really. the old style lockers are still popular oncircuits here (we have almost0 oval track, all road type tracks) and you are right thatsomecan give some understeerbut the spools are worse. driving style isdifferent and i find the spool is much harder on tyres as you have to create more oversteer with the gas pedal to counter the understeer (or go slower into bends which isjust not as muchfun)